Comtech EF Data ODM-840 - Manual (Page 29)

ODM/R-840 Outdoor Remote Router Revision 0
Introduction MN-ODM840
1–3
• The data interface is a bidirectional path that connects the customer’s equipment
(assumed to be the Data Terminal Equipment, or DTE) to the unit (assumed to be the Data
Communications Equipment, or DCE). All terrestrial data is connected using the available
10/100/1000 Gigabit Ethernet interface.
The platform includes support for CCM operation. CCM allows operators to define groups of
remotes having different modulation and coding parameters, as a means to improve efficiency on
existing satellite capacity.
On the Tx (transmit) side: The return modulator transmits IP datagrams and is compatible with
Comtech EF Data’s CDD‐880 Multi‐Receiver Router(s) located at a hub site.
In the FEC encoder, the data is differentially encoded, scrambled, and then VersaFEC‐encoded.
Following the encoder, the data is fed to the transmit digital filters, which perform spectral
shaping on the data signals. The resultant I and Q signals are then fed to the BPSK, QPSK, 8‐QAM,
or 16‐QAM modulator. The carrier is generated by a frequency synthesizer, and the I and Q signals
directly modulate this carrier to produce an IF output signal.
On the Rx (receive) side: The DVB‐S2 demodulator supports enhanced GSE decapsulation and
label filtering for up to 2,047 unique labels.
DVB‐S2 Receiver: The ODM/R‐840’s demodulator supports DVB‐S2 QPSK, 8‐PSK, 16‐APSK and 32‐
APSK demodulation up to 62 Msps, with receive data rates up to 167 Mbps depending on the
modulation type and code rate.
In DVB‐S2 operation, the receiver operates in the CCM mode. The receiver automatically detects
for spectral inversion and pilots ON/OFF, and supports spectral rolloff of 20%, 25% or 35%.
• Sect. 1.3 ODM/R‐840 Features
• Sect. 1.4 ODM/R‐840 Specifications
• Appendix B. FEC (Forward Error Correction)
The unit is managed through multiple interfaces providing options for both in‐band and out‐of‐
band monitor and control:
• Sect. 5.3 (ETHERNET‐BASED PRODUCT MANAGEMENT) SNMP (MIB II and
Private MIB)
• Sect. 5.4 (ETHERNET‐BASED PRODUCT MANAGEMENT) ODM‐840 Web Server
(HTTP) Interface
• Chapter 6. SERIAL‐BASED REMOTE PRODUCT MANAGEMENT